Monolithic Power Systems Inc. MP2019GN-P

Overview

MP2019GN-P from Monolithic Power Systems is a 40V-input, 300mA adjustable-output linear regulator with 10µA quiescent current, 1.25V–15V output range, ±2% output accuracy over temperature, and integrated power-good (PG) with programmable delay. It operates in industrial and automotive battery-powered systems where ultra-low standby power and wide VIN tolerance are critical - e.g., remote sensor nodes powered by 24V truck batteries.

For engineers reviewing the MP2019GN-P datasheet, MP2019GN-P pinout, MP2019GN-P application, or MP2019GN-P equivalent, key selection criteria include dropout voltage at 300mA load, PG threshold hysteresis, thermal shutdown behavior, FB reference stability, and SOIC-8 EP thermal performance under high ambient conditions.

Technical Context

The MP2019GN-P uses a PMOS pass transistor architecture enabling low dropout (420mV @ 300mA, VOUT=5V) and reverse-voltage blocking via internal body diode management. Its feedback loop regulates FB to 1.25V with 50nA input bias, supporting precise resistor-divider-based output programming.

Power-good functionality is implemented as an open-drain MOSFET with 89–97% VFB rising threshold and 5% hysteresis; PGDL pin enables capacitor-programmed delay (5–15ms with 47nF), while EN provides logic-level on/off control with 0.3V/1.8V thresholds and sub-1µA shutdown current.

Key Specifications

Pinout & Package

MP2019GN-P is housed in a thermally enhanced SOIC-8 EP package with exposed pad tied to GND for improved heat dissipation (θJA = 50°C/W, θJC = 10°C/W on 4-layer PCB). The exposed pad must be soldered to a dedicated ground plane for rated power handling (2.5W at TA = 25°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable-output LDO applications.

Compared with TPS7A4700RGWR and ADM7172ACPZ-R7, MP2019GN-P uniquely balances 40V input tolerance, 10µA IQ, integrated PG/PGDL, and SOIC-8 EP thermal capability - making it optimal for cost-sensitive, high-reliability industrial and automotive LDO applications where both wide VIN and ultra-low standby power are mandatory.

Availability

MP2019GN-P is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, portable medical devices, and smart energy meters requiring stable component supply across extended temperature and voltage ranges.

Supply support for MP2019GN-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan.

The MP2019 belongs to MPS's high-voltage linear regulator product line, engineered specifically for battery-powered and industrial systems demanding ultra-low IQ, wide input range, and integrated power sequencing features.

FAQ

What is the minimum output capacitor required for stability with MP2019GN-P?

The MP2019GN-P is stable with a minimum 0.47µF X5R or X7R ceramic capacitor on the output. Larger values (e.g., 22µF) improve load transient response and reduce output noise, but are not required for basic stability. Avoid Y5V dielectrics due to severe capacitance drift over temperature and bias.

How does the PGDL pin set the power-good delay time?

The PGDL pin draws a constant 3–9µA charging current (typ. 5.5µA) into an external capacitor. Delay time t_PGDL (ms) = C_PGDL (nF) × 1.7V / I_PGDL (µA). For example, a 47nF capacitor yields ~10ms delay. The PG signal asserts high only after this capacitor charges to 1.7V, preventing premature system wake-up during input ramp-up.

Can MP2019GN-P be used with input voltages above 40V?

No. The absolute maximum input voltage is +42V, but the recommended operating range is strictly 3V to 40V. Exceeding 40V risks permanent damage even briefly. For 48V systems, use an upstream TVS clamp or buck pre-regulator to limit VIN to ≤40V before the MP2019GN-P input.

What is the purpose of the NC pin (Pin 2) on MP2019GN-P?

Pin 2 is a true no-connect terminal - it has no internal bond wire or circuit connection. It must remain unconnected and un-soldered. Routing traces or placing vias to Pin 2 may cause mechanical stress or unintended coupling; leave it floating with no copper attachment per MPS layout guidelines.

Does MP2019GN-P support reverse-voltage protection internally?

No. The internal PMOS pass transistor includes a body diode that conducts from OUT to IN if VOUT > VIN - potentially causing destructive reverse current. External protection (e.g., series Schottky diode at VIN or ideal diode controller) is required in backup-battery or hot-swap configurations where output voltage may exceed input.

How is output voltage accuracy affected by load current and temperature?

Output voltage accuracy is specified as ±2% over –40°C to +125°C junction temperature and full load range (0–300mA). Load regulation contributes ≤15mV deviation (e.g., 5.00V → 4.985V), and line regulation adds ≤10mV. Combined, these ensure VOUT remains within ±2% of nominal across all operating conditions - critical for ADC references and precision analog circuits.

What thermal derating applies to MP2019GN-P in a 60°C ambient environment?

With θJA = 50°C/W, the maximum allowable power dissipation at TA = 60°C is PD_MAX = (150°C − 60°C) / 50°C/W = 1.8W. At 300mA output and 5V VOUT, power dissipation is (VIN − 5V) × 0.3A. Thus, VIN must stay ≤11V to keep PD ≤1.8W - confirming SOIC-8 EP requires careful thermal design above 60°C ambient.